Rename project to *subpoly* and create Voice class
Rename project to *subpoly* and create Voice class

* Rename project from *polysynth* to *subpoly*
* Create new class `Voice`
* Attach `voices` array to *subpoly*
* Change `setPitch` and `setWaveform` to getter/setters `pitch` and `waveform`
* Make `pitch` and `waveform` methods of the `Voice` class

okaybenji/subpoly